23128CA / 23128CAK Spherical Roller Bearing | 140×225×68mm | Nexans Bearings

23128CA · 23128CAK · Spherical Roller Bearing · 140mm Bore · 225mm OD · 68mm Width · Cr ~570 kN · GCr15 · OEM / Private Label Available

Specifications

⚠️ Selection Notice: 23128CA = cylindrical bore (direct shaft fit). 23128CAK = tapered bore 1:12 (requires adapter sleeve H3128 or withdrawal sleeve AH3128 for mounting on cylindrical shaft). Always confirm bore type before ordering.

CA vs CAK — Bore Type Comparison

Design & Construction

The 23128CA / 23128CAK is a double-row spherical roller bearing with a common sphered outer raceway, providing self-alignment capability to accommodate shaft deflection and misalignment up to ±1.5°.

• Double-row barrel-shaped rollers — high radial and combined axial load capacity, suitable for heavy shock loads

• Self-aligning outer ring — compensates for shaft deflection, housing misalignment, and thermal expansion up to ±1.5°

• 140mm bore / 225mm OD / 68mm width — ISO 23000 series, heavy-duty industrial classification

• Symmetrical roller profile — equal load distribution between both roller rows under combined loading

• W33 option — annular lubrication groove and three radial holes in outer ring for centralized relubrication systems

• Brass cage (W33/W33C3) — available for high-speed, high-temperature, or vibration-intensive applications

• GCr15 / AISI 52100 through-hardened steel — 60–64 HRC, full material traceability $CITE_4

• C3 internal clearance — recommended for most industrial applications to compensate for thermal expansion during operation

Applications

Cross Reference

⚠️ Cross-reference is based on dimensional equivalence (140×225×68mm). Internal geometry, load ratings, and cage design may differ between brands. Always verify with the bearing manufacturer before substitution in critical applications.

Dimensional & Load Data

Suffix Guide

FAQ

Q: What is the difference between 23128CA and 23128CAK?

23128CA has a cylindrical bore for direct shaft mounting by interference fit or induction heating. 23128CAK has a tapered bore (1:12) requiring an adapter sleeve (H3128) or withdrawal sleeve (AH3128), making field mounting and dismounting significantly easier — especially on long or inaccessible shafts.

Q: Which internal clearance should I specify?

C3 is recommended for most industrial applications where the bearing inner ring is heated during operation (interference fit on shaft + thermal expansion). C0 (normal) is suitable for light-load, ambient-temperature applications. Consult Nexans Bearings engineering for specific clearance selection.

Q: Do I need the W33 lubrication groove?

W33 is recommended when the bearing is mounted in a housing with centralized grease lubrication lines, or in applications where the bearing is not easily accessible for manual relubrication. For standard open housings with grease nipples on the shaft, W33 is not required.

Q: What is the correct installation procedure for 23128CA?

For 140mm bore: use an induction heater to heat the bearing to 80–100°C (never exceed 120°C). Mount immediately onto the shaft and hold in position until cooled. Never use direct flame or strike the bearing. Verify axial positioning and housing fit before final assembly.

Q: What is the correct installation procedure for 23128CAK?

Mount the adapter sleeve H3128 onto the shaft. Place the bearing onto the sleeve. Drive up the locknut (KM14 + MB14 lockwasher or HM3128 hydraulic nut) to the specified drive-up distance per ISO 281 / bearing manufacturer's mounting table. For large bearings, hydraulic nut method is strongly recommended.

Q: What lubrication is recommended?

NLGI Grade 2 lithium complex or polyurea grease for standard industrial applications. For high-temperature (>80°C continuous) or wet/contaminated environments, calcium sulfonate complex grease is recommended. Relubrication intervals per ISO 281 / OEM specification.

Q: Is OEM / private-label packaging available?

Yes. Custom box printing, laser-engraved part number and logo on bearing ring, full inner/outer branded packaging. SGS/BV/TÜV third-party inspection supported. MOQ and pricing on request.

Q: What documentation is available?

GCr15 / AISI 52100 material certificates, dimensional inspection reports (per ISO 15:2017), hardness test reports (60–64 HRC), dynamic load rating test data, packing lists, commercial invoices, certificates of origin.

Q: What is the MOQ and lead time?

Minimum 1 pc for sample evaluation. Volume pricing from 5 pcs. Standard lead time: 7–15 days ex-stock / 20–30 days for production orders. Trade terms: FOB Qingdao / CIF / EXW available.

Related Products — Nexans Bearings Spherical Roller Bearing Range

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